Elastic and plastic Poisson's ratios of nanoporous gold

Lukas Lührs; Celal Soyarslan; Jürgen Markmann; Swantje Bargmann; Jörg Weissmüller

doi:10.1016/j.scriptamat.2015.08.002

Elastic and plastic Poisson's ratios of nanoporous gold

Lukas Lührs^*
, Celal Soyarslan
, Jürgen Markmann
, Swantje Bargmann
, Jörg Weissmüller

^*Corresponding author for this work

Research output: Contribution to journal › Article › Academic › peer-review

68 Citations (Scopus)

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Abstract

We explore the elastic and plastic Poisson's ratios, ^νE and ^νP, of nanoporous gold, using digital image correlation during compression experiments including load/unload segments. The two coefficients differ significantly, with ^νE independent of the ligament size, L, and with a trend for ^νP∞L at not too large L. Disorder in the network of ligaments may explain why ^νE is smaller than predicted by lattice-based models. Finite element simulations, based on the Deshpande-Fleck constitutive law, validate the data analysis. The constitutive law captures work-hardening and transverse flow of nanoporous gold in good agreement with the experiment.

Original language	English
Pages (from-to)	65-69
Number of pages	5
Journal	Scripta materialia
Volume	110
DOIs	https://doi.org/10.1016/j.scriptamat.2015.08.002
Publication status	Published - 1 Jan 2016
Externally published	Yes

Keywords

Finite element analysis
Mechanical properties
Nanoporous metal
Nanostructure
Porous material

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Luhrs-2016-Elastic-and-plastic-poissons-ratiosFinal published version, 737 KBLicence: CC BY-NC-ND

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title = "Elastic and plastic Poisson's ratios of nanoporous gold",

abstract = "We explore the elastic and plastic Poisson's ratios, νE and νP, of nanoporous gold, using digital image correlation during compression experiments including load/unload segments. The two coefficients differ significantly, with νE independent of the ligament size, L, and with a trend for νP∞L at not too large L. Disorder in the network of ligaments may explain why νE is smaller than predicted by lattice-based models. Finite element simulations, based on the Deshpande-Fleck constitutive law, validate the data analysis. The constitutive law captures work-hardening and transverse flow of nanoporous gold in good agreement with the experiment.",

keywords = "Finite element analysis, Mechanical properties, Nanoporous metal, Nanostructure, Porous material",

author = "Lukas L{\"u}hrs and Celal Soyarslan and J{\"u}rgen Markmann and Swantje Bargmann and J{\"o}rg Weissm{\"u}ller",

note = "Funding Information: This work was supported by DFG via SFB 986 “M 3 ”, sub-projects B2 and B6. Publisher Copyright: {\textcopyright} 2015 Acta Materialia Inc.",

year = "2016",

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doi = "10.1016/j.scriptamat.2015.08.002",

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T1 - Elastic and plastic Poisson's ratios of nanoporous gold

AU - Lührs, Lukas

AU - Soyarslan, Celal

AU - Markmann, Jürgen

AU - Bargmann, Swantje

AU - Weissmüller, Jörg

PY - 2016/1/1

Y1 - 2016/1/1

N2 - We explore the elastic and plastic Poisson's ratios, νE and νP, of nanoporous gold, using digital image correlation during compression experiments including load/unload segments. The two coefficients differ significantly, with νE independent of the ligament size, L, and with a trend for νP∞L at not too large L. Disorder in the network of ligaments may explain why νE is smaller than predicted by lattice-based models. Finite element simulations, based on the Deshpande-Fleck constitutive law, validate the data analysis. The constitutive law captures work-hardening and transverse flow of nanoporous gold in good agreement with the experiment.

AB - We explore the elastic and plastic Poisson's ratios, νE and νP, of nanoporous gold, using digital image correlation during compression experiments including load/unload segments. The two coefficients differ significantly, with νE independent of the ligament size, L, and with a trend for νP∞L at not too large L. Disorder in the network of ligaments may explain why νE is smaller than predicted by lattice-based models. Finite element simulations, based on the Deshpande-Fleck constitutive law, validate the data analysis. The constitutive law captures work-hardening and transverse flow of nanoporous gold in good agreement with the experiment.

KW - Finite element analysis

KW - Mechanical properties

KW - Nanoporous metal

KW - Nanostructure

KW - Porous material

UR - https://www.scopus.com/pages/publications/84943347540

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DO - 10.1016/j.scriptamat.2015.08.002

M3 - Article

AN - SCOPUS:84943347540

SN - 1359-6462

VL - 110

SP - 65

EP - 69

JO - Scripta materialia

JF - Scripta materialia

ER -

Elastic and plastic Poisson's ratios of nanoporous gold

Abstract

Keywords

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